Listing 1 defines a simple shopping cart Web service that allows the shopper to add, remove, and query items in the cart.

清单1定义了一个简单的购物车Web服务，它允许顾客在购物车中添加、删除和查询商品条目。

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The Web service also accepts a sales tax rate argument besides the shopping cart information, which is an XML document containing the product IDs and their respective quantities.

除了购物车信息，Web服务还接受销售税率参数，购物车信息为一个包含产品ID及各自数量的XML文档。

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The CartWrapperService component has its own concern — combining all services to a complete shopping cart (for example, it could also include calls to a pricing service).

Cart WrapperService组件也有它自己的相关因素——把所有的服务合并成一个完整的购物车(例如，它还可以包括对价格服务的调用)。

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The new collaboration between Twitter and American Express will turn the social media service into a shopping cart.

CNN: Twitter and Amex to let you pay with a hashtag

His main service aims to reduce "shopping cart abandonment" (that sad occurrence when visitors to a Web site leave before completing a purchase).

FORBES: Magazine Article